{{Short description|Lead chloride iodate mineral}} {{Infobox mineral | name = Seeligerite | boxwidth = | boxbgcolor = | image = Seeligerita 01.JPG | alt = | caption = Seeligerite crystals, from Sierra Gorda, Antofagasta Region, Chile. | category = Iodate minerals | formula = Pb<sub>3</sub>Cl<sub>3</sub>(IO<sub>3</sub>)O | IMAsymbol = Sli<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|url=https://www.cambridge.org/core/journals/mineralogical-magazine/article/imacnmnc-approved-mineral-symbols/62311F45ED37831D78603C6E6B25EE0A|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}</ref> | molweight = | strunz = 4.KB.15 | dana = | system = Orthorhombic | class = Disphenoidal (222) <br/>H-M symbol: (2 2 2) | symmetry = ''C''222<sub>1</sub> | unit cell = | color = | colour = | habit = | twinning = | cleavage = | fracture = | tenacity = | mohs = | luster = | streak = | diaphaneity = | gravity = | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = <ref name=Mindat>[http://www.mindat.org/min-3603.html Mindat with occurrence]</ref><ref name=webmin>[http://www.webmineral.com/data/Seeligerite.shtml Webminera datal]</ref> }}
'''Seeligerite''' is a rare complex lead chloride iodate mineral with formula: Pb<sub>3</sub>Cl<sub>3</sub>(IO<sub>3</sub>)O. It is a yellow mineral crystallizing in the orthorhombic system. It has perfect to good cleavage in two directions and a quite high specific gravity of 6.83 due to the lead content. It is translucent to transparent with refractive indices of n<sub>α</sub>=2.120 n<sub>β</sub>=2.320 n<sub>γ</sub>=2.320.<ref name=Mindat/>
It was first reported in 1971 from the Casucha Mine, Sierra Gorda, Antofagasta Region, Chile.<ref name=Mindat/>
==References== {{reflist}}
Category:Lead minerals Category:Oxide minerals Category:Iodate minerals Category:Orthorhombic minerals Category:Minerals in space group 20 Category:Oxychlorides
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